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Single Family ResidenceResidential
$294,024$133 / ft²
TopHap EstimateOur estimate of what this home would sell for today, based on nearby sales, the home's size and features, and local price trends. It is a starting point, not an appraisal.· confidence 88How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026
Last sold for $135,000 on Aug 16, 2018

17420 JEFFERSON ST

UNION, IL 60180
3
Beds
1
Baths
2,206 ft²
Living AreaTotal finished area of the structures, from county records. Some counties include shared space like hallways or a building gym, so it may not match a listing.
0.64 ac
Lot SizeThe size of the land the home sits on, from county records.
1930
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$294K
$258K low$330K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$135,000 · Aug 16, 2018

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,100 (2024)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$101,269 (2024)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$14,701
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$86,568
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$91,579
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$303,807

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.18 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.51%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.1 percent flood zone

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Tlog Home
CountyMcHenry
Lot (acres)The size of the land the home sits on, from county records.0.64
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
FoundationWhat the home is built on, such as a concrete slab, a crawl space, or a basement.Raised (Unspecified)
HeatingThe type of heating system in the home.Gas
FireplaceWhether the home has a fireplace, and what kind.Yes

Transaction History(1)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

H
Marengo High SchoolA-
High · Grades 9–12 · 2.7 mi
M
Marengo Community Middle SchoolC
Middle · Grades 6–8 · 3.1 mi
E
Locust Elementary SchoolA
Elementary · Grades PK–3 · 3.2 mi

District: Marengo-Union Elementary Consolidated District 165

Neighborhood · ZIP 60180These are comparison scores, not percentages. 100 equals the national average, so 150 means about 50% above average.

CrimeLocal crime compared with the rest of the country, where 100 is average. It reflects things like population density, income, and how crime gets reported.84
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.108
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.48

Index scale: 100 = US average (tick). Lower is better.

Homes occupiedThe share of homes here that someone lives in. The rest sit empty, including vacation and for-sale homes.96%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.22%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.0%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.6%
PopulationHow many people live in this area.3,015
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.145 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$125,446
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$133,187
Average tempThe average temperature here across a full year.48°F
Annual precipHow much rain and melted snow falls here in a typical year.36 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.54%

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Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

How this home compares

17420 Jefferson St measured against every home in its neighborhood, its ZIP code and its county, using county assessor records refreshed nightly. A home can stand out in one of those areas and look ordinary in another, because each one holds a different mix of homes.

  • Worth less than 74% of homes in Union 60180
  • Costs less per square foot than 97% of homes in McHenry County
  • Bigger than 67% of homes in McHenry County
  • Has a bigger lot than 79% of homes in McHenry County
  • Older than 95% of homes in McHenry County

What homes are worth in Union 60180

Each bar is how many homes fall in that price range. The marker is this home.

This home
$165K$756K

This home is worth more than 26% of homes in Union 60180.

How it measures up in Union 60180

The dot is this home. The mark in the middle is the typical home in Union 60180.

Estimated value$294,024
CheaperTypical $398,116Pricier

Pricier than 26% of homes nearby

Price per ft²$133
CheaperTypical $187Pricier

Pricier than 21% of homes nearby

Living area2,206 ft²
SmallerTypical 2,125 ft²Bigger

Bigger than 54% of homes nearby

Lot size0.64 ac
SmallerTypical 1.16 acBigger

Bigger than 39% of homes nearby

Year built1930
OlderTypical 1975Newer

Newer than 24% of homes nearby

How 17420 Jefferson St ranks against every home in each area.
MeasureThis homeUnion 60180McHenry County
Estimated valuepricier than$294,02426% of homes29% of homes
Price per ft²pricier than$13321% of homes3% of homes
Living areabigger than2,206 ft²54% of homes67% of homes
Lot sizebigger than0.64 ac39% of homes79% of homes
Year builtnewer than193024% of homes5% of homes

About 17420 Jefferson St

How much is 17420 Jefferson St, Union, IL worth?

The TopHap Estimate for 17420 Jefferson St, Union, IL is $294,024 as of Aug 30, 2026. The likely range is $258,156 to $329,892. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 17420 Jefferson St, Union, IL last sell?

17420 Jefferson St, Union, IL last sold on Aug 16, 2018 for $135,000, according to the county's recorded deed.

How big is 17420 Jefferson St, Union, IL?

17420 Jefferson St, Union, IL has 3 bedrooms, 1 bathrooms, 2,206 square feet of living space and a 0.64-acre lot.

When was 17420 Jefferson St, Union, IL built?

17420 Jefferson St, Union, IL was built in 1930, making it 96 years old. It is a tlog home home. The building has 1 story.

What schools serve 17420 Jefferson St, Union, IL?

17420 Jefferson St, Union, IL is assigned to Marengo High School (high), rated A-; Marengo Community Middle School (middle), rated C; Locust Elementary School (elementary), rated A. All sit in Marengo-Union Elementary Consolidated District 165. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 17420 Jefferson St, Union, IL compare to other homes in Union 60180?

Among the 652 homes in Union 60180, it is worth more than 26% of them ($294,024 against a typical $398,116), its price per square foot is higher than 21% of them ($133 against a typical $187), it is bigger than 54% of them (2,206 ft² against a typical 2,125 ft²), its lot is bigger than 39% of them (0.64 ac against a typical 1.16 ac) and it is newer than 24% of them (1930 against a typical 1975). Measured against all of McHenry County, it is worth more than 29% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 17420 Jefferson St, Union, IL?

The 2024 property tax bill for 17420 Jefferson St, Union, IL was $6,100. The county assessed it at $101,269.

More homes on Jefferson St

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